<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3c.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>My mailtastic contact page</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    </head>
    <body>
        <?php
        if($_SERVER['REQUEST_METHOD'] === "GET") {
            ?>
        <form method="post" action="">
            <fieldset>
                <legend>Mail me</legend>
                <label>Your E-mail Address<br><input type="text" name ="from"></label>
                <br>
                <label>Subject<br><input type="text" name ="subject"></label>
                <br>
                <label>Message<br><textarea name="message" rows="5" cols="60"></textarea></label>
                <br>
                <input type="submit" value="Send Mail">
                </fieldset>
            </form><?php
        } elseif($_SERVER['REQUEST_METHOD'] === "POST") {
            /*
                Please note that this example code is severely flawed and should never be put to actual use.
            */
            $mail_accepted = NULL;
            $mail_accepted = mail("me" , $_POST['subject'] , $_POST['message'] , "From: " . $_POST['from'] . "\r\n");
            
            if($mail_accepted === TRUE) {
                ?>
            <p>Thank you. Your mail has been accepted for delivery.</p>
                <?php
            } else {
                ?>
            <p>Sorry. Your mail has not been accepted for delivery.</p>
                <?php
            }
        }
        ?>
    </body>
</html>